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  • Callable抛出异常与future.get

     1 public class ThreadPoolTest {
     2     @Test
     3     public void testException(){
     4         try{
     5             testExecutorServiceException();
     6         }catch(Exception e){
     7             //e.printStackTrace();
     8             System.out.println("fa");
     9         }
    10 
    11     }
    12     public void testExecutorServiceException() throws Exception{
    13         Boolean flag = true;
    14         //线程池,一个线程,线程池内部的任务是异步串行执行
    15         ExecutorService executorService = Executors.newSingleThreadExecutor();
    16         //results中存放任务执行的结果
    17         List<Future<Boolean>> results = new ArrayList<Future<Boolean>>(10);
    18         try{
    19             for(int i=0; i<10; i++){
    20                 Future<Boolean> future = executorService.submit(new ActSKUCacheCallable(i, flag));
    21                /* if(false == future.get()){
    22                     //throw new Exception("4324");
    23                     //return;
    24                 }*/
    25                 //收集任务执行的结果,存储在results中
    26                 results.add(future);
    27             }
    28             //主线程中执行,所以flag的值不一定是异步任务处理后的结果
    29             System.out.println("结果:" + flag);
    30             for(int i=0; i<10; i++){
    31                 boolean flag1 = results.get(i).get();
    32                 System.out.println("执行结果:" + flag1);
    33             }
    34 
    35         }catch(Exception e){
    36             //e.printStackTrace();
    37             throw e;
    38         }
    39     }
    40 
    41     private class ActSKUCacheCallable implements Callable<Boolean> {
    42         int i;
    43         Boolean flag;
    44         ActSKUCacheCallable(int i, Boolean flag){
    45             this.i = i;
    46             this.flag = flag;
    47         }
    48         public Boolean call() throws Exception {
    49             try {
    50                 if(i % 2 != 0){
    51                     throw new Exception("try");
    52                 }
    53                 System.out.println("正常执行");
    54             } catch (Exception e) {
    55                 System.out.println("catch");
    56                 //flag = false;
    57                 //抛出异常不影响线程池中其他任务的执行
    58                 throw e;
    59                 //return Boolean.FALSE;
    60             } finally {
    61                 System.out.println("finally 代码块" + flag);
    62             }
    63 
    64             System.out.println("try代码块外面");
    65             return Boolean.TRUE;
    66         }
    67     }
    68 }

    执行结果:

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  • 原文地址:https://www.cnblogs.com/zhima-hu/p/9152454.html
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